Please use this link to access this publication. Abstract Objective To examine the relationship between reported prenatal cannabis use and neonatal and maternal outcomes and whether the legalisation of cannabis in Canada affected the rates of reported use or the association with maternal and neonatal outcomes. Design Population-based retrospective cohort study. Setting Routinely collected data in a real-world setting. Population All women in the Canadian province of Nova Scotia with singleton births between 1 January 2004 and 30 June 2021. Methods The association between cannabis use and maternal and neonatal outcomes was examined using generalised linear models with inverse probability weighting. Main outcome measures...